C3121
C3121 Ford engine fault code diagnosis, code meaning,symptoms and how to fix it.C3121 Diagnosis
The fuse in the main PDM powering this circuit may be open. The root cause could be excessive loads on an output, or a short to ground in the VBAT2 supply to the CHM.The BHM is detecting more than one smart switch with the same ID number present on the vehicle. The outputs controlled by the switch and the indicator in the switch are commanded OFF.
The disconnected pipe malfunction is detected when the ventilator tube from the valve cover to the separator device is disconnected resulting in a pressure below the lower limit.Both of these malfunctions will result in a DTC being set.
Ford C3121 Fault Code Meaning :
Ford C3121 Symptoms :
Ford C3121 Reasons :
How To Fix Ford C3121 Trouble Code ?
Which Ford cars have the code C3121?
- C3121 Ford Aerostar
- C3121 Ford Bronco
- C3121 Ford C-Max
- C3121 Ford C-Max Energi
- C3121 Ford C-Max Hybrid
- C3121 Ford Contour
- C3121 Ford Crown Victoria
- C3121 Ford EcoSport
- C3121 Ford Econoline
- C3121 Ford Edge
- C3121 Ford Escape
- C3121 Ford Escape Hybrid
- C3121 Ford Escort
- C3121 Ford Everest
- C3121 Ford Excursion
- C3121 Ford Expedition
- C3121 Ford Explorer
- C3121 Ford Explorer Sport Trac
- C3121 Ford F-150
- C3121 Ford F-250
- C3121 Ford F-350
- C3121 Ford Fiesta
- C3121 Ford Flex
- C3121 Ford Focus
- C3121 Ford Focus Electric
- C3121 Ford Freestar
- C3121 Ford Freestyle
- C3121 Ford Fusion
- C3121 Ford Fusion Energi
- C3121 Ford Fusion Hybrid
- C3121 Ford Fusion Plug-In Hybrid
- C3121 Ford GT
- C3121 Ford Mustang
- C3121 Ford Mustang Mach-E
- C3121 Ford Mystique
- C3121 Ford Probe
- C3121 Ford Ranger
- C3121 Ford Taurus
- C3121 Ford Taurus X
- C3121 Ford Tempo
- C3121 Ford Thunderbird
- C3121 Ford Transit
- C3121 Ford Transit Connect
- C3121 Ford Windstar
A code is a fault code and it indicates that something has gone wrong with your car's engine.
It can be caused by many different problems, including a faulty battery, a bad fuel pump, or even a cracked exhaust manifold.
You will need to diagnose the problem before you can fix it. The best way to do this is with an OBD scanner tool.
A scan tool will tell you what needs fixing and how much it will cost in order to fix that particular issue.